gistfile1.scala

//this works

val route =
    path("hello"){
      get{
        respondWithHeader(ETag("asdf")){
          complete{
            "{}"
          }
        }
      }
    }
    
// this does not work 
val route =
    path("hello"){
      get{
        respondWithHeader(ContentType(MediaTypes.`text/html`)){
          complete{
            "{}"
          }
        }
      }
    }
    
/*
[error]  found   : akka.http.scaladsl.model.ContentType
[error]  required: akka.http.scaladsl.model.HttpHeader
[error]         respondWithHeader(ContentType(MediaTypes.`text/html`)){
[error]                                      ^
[error] one error found
*/

    
// nor does this

val route =
    path("hello"){
      get{
        respondWithHeader(`Content-Type`(MediaTypes.`text/html`)){
          complete{
            "{}"
          }
        }
      }
    }
    
/*
[error] /Users/dustinwhitney/Documents/development/september/app/modules/streams-test/src/main/scala/Main.scala:42: not found: value Content-Type
[error]         respondWithHeader(`Content-Type`(MediaTypes.`text/html`)){
[error]                           ^
[error] one error found
[error] (streamsTest/compile:compileIncremental) Compilation failed
*/